What would be a good reason to avoid using a HEMA lens?

Choosing to avoid using a HEMA (Hydroxyethyl Methacrylate) lens primarily due to the need for a durable lens is based on the material's characteristics. HEMA lenses, while popular for their comfort and ease of adaptation, can be less durable compared to other materials, such as rigid gas permeable lenses or modern silicone hydrogel lenses. HEMA is more prone to damage from environmental factors, requiring careful handling and maintenance to avoid scratches or other forms of degradation.

Patients requiring lenses that can withstand daily wear, especially in challenging environments or those with a more active lifestyle, would benefit from lenses with higher durability. Lenses made from more robust materials can provide better resistance to tearing, scratching, and other wear and tear that could impact the patient's visual performance and comfort.

In the context of the other options, while HEMA lenses do come in various strengths, are known for their comfort, and are generally easy for patients to adapt to, these factors do not address potential concerns about durability. Therefore, when durability is a priority, opting for an alternative lens that guarantees better resistance to damage would be advisable.